CN102176483B - Water-heating photoelectric/heat solar system - Google Patents

Water-heating photoelectric/heat solar system Download PDF

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CN102176483B
CN102176483B CN201110038851A CN201110038851A CN102176483B CN 102176483 B CN102176483 B CN 102176483B CN 201110038851 A CN201110038851 A CN 201110038851A CN 201110038851 A CN201110038851 A CN 201110038851A CN 102176483 B CN102176483 B CN 102176483B
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heat
photoelectricity
photovoltaic cell
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energy
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CN102176483A (en
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何永泰
肖丽仙
彭跃红
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Chuxiong Normal University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/60Thermal-PV hybrids

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Abstract

The invention discloses a water-heating photoelectric/heat solar system, belonging to the field of a photoelectric technology and comprising a flat-plate reflecting condenser, a photoelectric/heat sunlight receiver, a heat insulation water tank, an energy control and management subsystem, an electric energy storer, an upper circulating pipe and a lower circulating pipe, wherein the heat insulation water tank is respectively connected with a hot water output end and a cold water input end of the photoelectric/heat sunlight receiver through the upper circulating pipe and the lower circulating pipe; the flat-plate reflecting condenser is connected with the upper end of the photoelectric/heat sunlight receiver; an anode of the energy control and management subsystem is connected with an output anode of a photovoltaic battery in the photoelectric/heat sunlight receiver and an anode of the electric energy storer; and a cathode of the energy control and management subsystem is connected with an output cathode of the photovoltaic battery in the photoelectric/heat sunlight receiver and a cathode of the electric energy storer. The invention has the advantages of reducing system cost and complexity due to no adoption of a solar tracing system, increasing input solar radiation density, decreasing energy transmission loss, increasing energy conversion efficiency and enhancing practicability.

Description

A kind of water hot type photoelectricity/heat solar system
Technical field
The present invention relates to a kind of photoelectricity/heat solar system, belong to field of photoelectric technology.
Technical background
At present, solar energy application systems such as single photovoltaic generating system, solar water heater have obtained using widely.But single solar water heater and single photovoltaic generating system exist all that energy utilization efficiency is lower, cost is high, problem such as big takes up room.Independently the photoelectric conversion efficiency of photovoltaic generating system only between 5%-15%, needs 6000 yuan (comprising infrastructure such as plumbing) and its cost of cover solar water heater is installed approximately, and these factors have all limited promoting the use of of solar energy system.
1978, Kern and Russell proposed the notion of photoelectric/photothermal hybrid solar system the earliest.According to the difference of heat-transfer working medium, can be divided into two kinds of air heat type and water hot types.
In recent years, along with international community to utilizing the reinforcement of regenerative resource research, increase sharply about the activity of photoelectric/photothermal system research.As with the alternative system of building integrated photovoltaic system, air heat type photoelectric/photothermal system is studied widely.At home, the people such as Zhao Jun of University Of Tianjin in 2009 have introduced air heat type photoelectricity/hot hybrid solar system, and under Efficiency in Buildings in Tianjin Area solar radiation condition, system are tested.In the same year, people such as the Sun Jian of Southeast China University have set up Mathematical Modeling to air type optically focused photoelectric/photothermal system, and its diabatic process is carried out numerical simulation, and heat, the electrical efficiency of heat collector are analyzed.The result shows that its heat efficiency can reach 65%.
For water hot type photoelectricity/hot hybrid solar system, Elazari analyzes the performance and the commercial characteristic of system.Chinese patent " mixed photoelectric light heat collector " (patent No. CN200410063405.5) has been introduced the structure of basic photoelectric/photothermal system.But the useful efficency of these hot water type photoelectricity/hot hybrid systems is low, and cost is higher, and poor practicability does not still have ripe product to put goods on the market at present.
Summary of the invention
The objective of the invention is to improve the useful efficency and the practicality of hot water type photoelectricity/heat solar system, propose a kind of water hot type photoelectricity/heat solar system with stay-warm case and oligomeric reflective optical system in order to overcome the defective of prior art.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:
A kind of water hot type photoelectricity/heat solar system comprises: flat reflective concentrator, photoelectricity/hot sunlight receiver, attemperater, energy control and management subsystem, energy storage, upper circular tube and following circulation pipe.
Said flat reflective concentrator is used for reflected solar radiation light, and it is arrived on photoelectricity/hot sunlight receiver, thereby improves system's incident solar radiation density.Wherein, the area requirements of flat reflective concentrator is more than or equal to photoelectricity/hot sunlight receiver top surface area.In addition, effectively be radiated on the upper surface of photoelectricity/hot sunlight receiver for guaranteeing flat reflective concentrator reverberation, the flat reflective concentrator can tilt according to the difference of Various Seasonal sun altitude forward or backward.
It is electric energy and heat energy that said band photoelectricity/hot sunlight receiver is used for conversion of solar energy, is that the twin of system can device.Form by stay-warm case, air layer, photovoltaic cell, insulation adhesive-layer, heat collector and heat insulation layer.At photoelectricity/hot sunlight receiver upper surface the translucent cover stay-warm case is installed, is used to reduce photoelectricity/hot sunlight receiver upper surface thermal loss; It is electric energy and heat energy that photovoltaic cell is used for conversion solar; Heat collector is used to absorb the heat that the photovoltaic cell conversion generates, and conversion solar is heat energy, and heats for water; Heat insulation layer is used to suppress heat collector through the heat radiation of heat conduction ambient, reduces bottom and thermal loss on every side.
Said attemperater is used for depositing the hot water that heat collector heats.In heat collector and attemperater, lean on the pressure differentials that the water temperature difference is produced among both to promote the hot water motion, realize the circulation heating of water.
Said energy control and management subsystem is used for the tracking Control to photovoltaic cell peak power output point on the one hand, improves photovoltaic cell electricity delivery efficiency; Storage is controlled to the energy of energy storage on the other hand, prevents that energy storage from overcharging and discharge, improves energy storage quality, prolongation energy storage useful life thus.
Said energy storage is used to store the electric energy of photovoltaic cell output.Store the different of control mode according to energy storage density, memory capacity and energy, adoptable material has: cadmium nickel ckel-Cadmium (NiCD) battery, metal nickel hydride Metal Hydride Nickel (NiMH) battery, sealed lead-acid Sealed Lead Acid (SLA) storage battery, polymer Li-ion (Li+) battery and super capacitor Supercapacitors etc.
Said upper circular tube and following circulation pipe are used for attemperater and are connected with water route between photoelectricity/hot sunlight receiver.
Annexation between the above-mentioned building block is following:
Attemperater is connected with the cold water input with the output end of hot water of photoelectricity/hot sunlight receiver respectively through upper circular tube, following circulation pipe.The flat reflective concentrator is connected with the upper end of photoelectricity/hot sunlight receiver.Energy control and management subsystem anodal simultaneously with photoelectricity/hot sunlight receiver in photovoltaic cell output cathode and energy storage is anodal links to each other.The negative pole of energy control and management subsystem links to each other with output negative pole and the negative pole of energy storage of photovoltaic cell in photoelectricity/hot sunlight receiver simultaneously.
Beneficial effect
Water hot type photoelectricity/heat solar system that the present invention proposes, the present invention need not solar tracking system, has reduced system cost and complexity; Simultaneously, utilize flat reflective concentrator and stay-warm case to improve input solar radiation density, reduced energy transmission loss, improved energy conversion efficiency, strengthened practicality.
Description of drawings
Fig. 1 is that water hot type photoelectricity of the present invention/heat solar system configuration is formed sketch map;
Fig. 2 is flat reflective concentrator and photoelectricity/integrated optic path sketch map of hot sunlight recipient;
Fig. 3 is photoelectricity/hot sunlight receiver structural representation;
Fig. 4 is a photovoltaic cell back temperature variation diagram;
Fig. 5 is collector structure figure;
Wherein, 1-flat reflective concentrator, 2-attemperater, 3-photoelectricity/hot sunlight receiver; 4-energy control and management subsystem, 5-energy storage, circulation pipe under the 6-, 7-upper circular tube; 8-stay-warm case, 9-air layer, 10-photovoltaic cell, the 11-adhesive-layer that insulate; The 12-heat collector, the 13-heat insulation layer, 14-is dull and stereotyped, the 15-pipe.
Embodiment
Explain further details below in conjunction with the accompanying drawing specific embodiments of the invention.
A kind of water hot type photoelectricity/heat solar system; Its structure is formed as shown in Figure 1, comprising: flat reflective concentrator 1, attemperater, 2 photoelectricity/hot sunlight receiver 3, energy control and management subsystem 4, energy storage 5, circulation pipe 6 and upper circular tube 7 down.
One, flat reflective concentrator
Said flat reflective concentrator 1 is used for reflected solar radiation light, and reverberation is arrived on photoelectricity/hot sunlight receiver 3, improves system's incident solar radiation density thus.The material of flat reflective concentrator 1 can adopt the good materials of reflective characteristic such as aluminum slice.Flat reflective concentrator 1 possesses following technical characterictic:
(1) area of flat reflective concentrator 1 is by the top surface area decision of photoelectricity/hot sunlight receiver 3.For guaranteeing that reverberation district light intensity can evenly distribute and the upper surface that covers photoelectricity/hot sunlight receiver 3 fully, the area of flat reflective concentrator 1 is greater than the top surface area that equals photoelectricity/hot sunlight receiver 3.For example: when the top surface area of said photoelectricity/hot sunlight receiver 3 is 1.5m 2The time, the area of flat reflective concentrator 1 is greater than and equals 1.5m 2
(2) be to guarantee that the reverberation of flat reflective concentrator 1 effectively is radiated at the upper surface of photoelectricity/hot sunlight receiver 3, flat reflective concentrator 1 can tilt according to the difference of Various Seasonal sun altitude forward or backward.For example: in the winter time, sun altitude reduces, and the reflecting surface of flat reflective concentrator 1 should tilt to the sunlight receiving plane; In summer, sun altitude increases, the reflecting surface face tilt of should supporting or opposing.The light path signal of the two is as shown in Figure 2.
Two, photoelectricity/hot sunlight receiver
It is electric energy and heat energy that said photoelectricity/hot sunlight receiver 3 is used for conversion of solar energy, is the twin ability device in the native system.
The structure of these parts is as shown in Figure 3, is made up of stay-warm case 8, air layer 9, photovoltaic cell 10, insulation adhesive-layer 11, heat collector 12 and heat insulation layer 13 successively.Wherein, insulation adhesive-layer 11 is coated between the end face of the back side and heat collector 12 of photovoltaic cell 10, with the two connection.Heat insulation layer 13 joins with the back side of heat collector 12.Stay-warm case 8 is installed in the end face of photovoltaic cell 10.Between stay-warm case 8 and photovoltaic cell 10 end faces, leaving the space, is to be air layer 9.
Photoelectricity/hot sunlight receiver has following technical characterictic:
(1) at photoelectricity/hot sunlight receiver 3 upper surfaces transparent stay-warm case 8 is installed, is used to reduce photoelectricity/hot sunlight receiver 3 upper surface thermal losss.The light transmittance requirement of said stay-warm case 8 materials is greater than 0.9, and material can be glass, polymer etc.
(2) to be used for conversion solar be electric energy and heat energy to photovoltaic cell 10.Photovoltaic cell 10 is in photoelectric conversion process, and incident light has 5%-15% to be converted into electric energy, and the incident solar energy above 85% is reflected or is converted into heat energy.In this process, photovoltaic cell 10 back temperatures can continue to increase.For example: one is 25-30 ℃ by the silicon photovoltaic battery module that 12 monomer photovoltaic cells are formed, area is 15cm * 7cm in ambient temperature, and intensity of solar radiation is 450-950W/m 2Under the condition, the variation that records the photovoltaic cell back temperature is as shown in Figure 4.In intensity of solar radiation is 950W/m 2The time, solar cell back of the body temperature can reach 73 ℃.
Photovoltaic cell 10 can adopt silicon photovoltaic cell, GaAs photovoltaic cell, amorphous silicon (a-Si:H) photovoltaic cell etc.Photovoltaic cell 10 good high-temperature characteristics will help improving the output electricity and the heat efficiency of system.
(3) space that between stay-warm case 8 and photovoltaic cell 10 end faces, constitutes is air layer 9.The height size of air layer 9 can influence the temperature of photovoltaic cell 10.Preferably, the voidage of air layer 9 is between 5-10cm.
(4) insulation adhesive-layer 11 is the adhesive between photovoltaic cell 10 back sides and the heat collector 12, requires insulation adhesive-layer 11 to have insulating properties, adhesiveness and heat conductivity.Adoptable material is heat conductive silica gel or heat-conducting silicone grease etc.
(5) heat collector 12 is used to absorb the heat that photovoltaic cell 10 generates, and is the water heating.Heat collector 12 is flat board-tubular construction, and is as shown in Figure 5, and the flat board 14 of heat collector directly sticks on the back side of photovoltaic cell, and pipe 15 is used to deposit water.Heat collector 12 can adopt copper, aluminium alloy, copper aluminum composite material or stainless steel material etc.Special, require to have good heat conductivity and insulating properties between heat collector 12 and the photovoltaic cell 10.
In photoelectricity/hot sunlight receiver 3, can be through changing the ratio that ratio that photovoltaic cell 10 areas account for photoelectricity/hot sunlight receiver 3 top surface area is come the change system output electricity and the heat efficiency.The coverage rate ξ of photovoltaic cell 10 is expressed as:
ξ = A pv A c - - - ( 1 )
In the formula 1, A cBe the top surface area of photoelectricity/hot sunlight receiver 3, A PvArea for photovoltaic cell 10; Coverage rate ξ can be expressed as the influence of system's delivery efficiency:
η pvt=ξη pvt (2)
In the formula 2, η tBe the heat conversion efficiency of heat collector 12, η PvBe photovoltaic cell 10 photoelectric conversion efficiencys.
For example: the top surface area of supposition photoelectricity/hot sunlight receiver 3 is 1.5m 2, photovoltaic cell light 10 photoelectric transformation efficiencies are 13%, heat collector 12 thermal conversion efficiencies are 40%.If the area of photovoltaic cell 10 is 1.5m 2, coverage rate ξ is 1, and then system's output gross efficiency is 55%, and electricity, heat output conversion efficiency ratio are 13: 40; If the area of photovoltaic cell 10 is 1m 2, coverage rate ξ is 0.667, and then system's output gross efficiency is 48.67%, and electricity, heat output conversion efficiency ratio are 8.67: 40.
(6) heat insulation layer 13 is used to suppress heat collector 12 through the heat radiation of heat conduction ambient, reduces its bottom and thermal loss on every side.It is little, not yielding and do not produce the characteristics of pernicious gas that heat insulation layer 13 requires to have thermal conductivity, can select for use but be not limited to like rock wool, polystyrene etc.
Three, attemperater
Said attemperater 2 is used for depositing photoelectricity/hot sunlight receiver 3 heat collectors 12 heated hot water.Photoelectricity/hot sunlight receiver 3 is connected with 6 pipes that circulate down by upper circular tube 7 with attemperater 2, leans on the pressure differentials that the water temperature difference is produced among both to promote the hot water motion, the circulation heating of realization water.
Four, energy control and management subsystem
This energy control and management subsystem 4 is used for the tracking Control to photovoltaic cell 10 peak power output points on the one hand, improves photovoltaic cell 10 electric delivery efficiencies; Storage is controlled to the energy of energy storage 5 on the other hand, prevents that energy storage 5 from overcharging and discharge, improves 5 useful lifes of power storage quality, prolongation energy storage thus.
Five, energy storage
Said energy storage 5 is used to store the electric energy of photovoltaic cell 10 outputs.Store the different of control mode according to energy storage density, memory capacity and energy, adoptable energy storage 5 has: cadmium nickel ckel-Cadmium (NiCD) battery, metal nickel hydride Metal Hydride Nickel (NiMH) battery, sealed lead-acid Sealed Lead Acid (SLA) storage battery, polymer Li-ion (Li+) battery and super capacitor Supercapacitors etc.
Six, upper circular tube and following circulation pipe
Said upper circular tube 7 and down circulation 6 pipes be used for attemperater 2 and be connected with water route between photoelectricity/hot sunlight receiver 3.
Annexation between the above-mentioned building block is following:
Attemperater 2 is connected with the cold water inlet end with the hot water outlet end of photoelectricity/hot sunlight receiver 3 respectively through upper circular tube 7, following circulation pipe 6.Flat reflective concentrator 1 is connected with photoelectricity/hot sunlight receiver 3.Energy control and management subsystem 4 anodal simultaneously with photoelectricity/hot sunlight receiver 3 in photovoltaic cell output cathode and 5 anodal linking to each other of energy storage.The negative pole of energy control and management subsystem 4 links to each other with output negative pole and the negative pole of energy storage 5 of photovoltaic cell in photoelectricity/hot sunlight receiver 3 simultaneously.
The course of work of native system is following:
At first, sunlight is radiated at the upper surface of photoelectricity/hot sunlight receiver 3 through direct irradiation, flat reflective concentrator 1 reflection dual mode.Utilize flat reflective concentrator 1 to increase photoelectricity/hot sunlight receiver 3 upper surface incident solar energy metric densities here.Photoelectricity/hot sunlight receiver 1 converts the incident sunlight into electric energy and heat energy.
Photovoltaic cell 10 is after energy control and management subsystem 4 carries out MPPT maximum power point tracking control, and the output electric energy also stores in the energy storage 5, guarantees that thus photovoltaic cell 10 has maximum power output.Simultaneously, the charge and discharge process of energy control and management subsystem 4 control energy storages 5 prevents that energy storage 5 from overcharging and overdischarge.
The heat energy that photoelectricity/hot sunlight receiver 3 produces is used to the water heating in heat collector 13 pipes 15; Photoelectricity/hot sunlight receiver 3 is connected with attemperater 2 with following circulation pipe 6 through upper circular tube 7, and promotes hot water by the different pressure differentials that produce of water temperature in heat collector 13 and the attemperater 2 and move, and hot water is kept in the attemperater 2.

Claims (5)

1. water hot type photoelectricity/heat solar system is characterized in that: comprise flat reflective concentrator (1), attemperater (2), photoelectricity/hot sunlight receiver (3), energy control and management subsystem (4), energy storage (5), following circulation pipe (6) and upper circular tube (7);
Said flat reflective concentrator (1) is used for reflected solar radiation light, and radiant light is arrived on photoelectricity/hot sunlight receiver (3), improves system's incident solar radiation density thus;
It is electric energy and heat energy that said photoelectricity/hot sunlight receiver (3) is used for conversion of solar energy, is the twin ability device in the native system; Be made up of stay-warm case, air layer, photovoltaic cell, insulation adhesive-layer, heat collector and heat insulation layer successively, wherein, the insulation adhesive-layer is coated between the photovoltaic cell back side and the heat collector end face, with the two connection; The back side of heat insulation layer and heat collector joins; Stay-warm case is installed in the end face of photovoltaic cell; Between stay-warm case and photovoltaic cell end face, leave the space, be air layer; Photoelectricity/hot sunlight receiver (3) has following technical characterictic:
(1) at photoelectricity/hot sunlight receiver (3) upper surface transparent stay-warm case is installed, is used to reduce photoelectricity/hot sunlight receiver (3) upper surface thermal loss, the light transmittance requirement of said stay-warm case material is greater than 0.9;
(2) to be used for conversion solar be electric energy and heat energy to photovoltaic cell;
(3) the insulation adhesive-layer is the adhesive between the photovoltaic cell back side and the heat collector, requires the insulation adhesive-layer to have insulating properties, adhesiveness and heat conductivity;
(4) heat collector is used to absorb the heat that the photovoltaic cell conversion generates, and is the water heating; Heat collector is flat board-tubular construction, and the platen surface of heat collector directly sticks on the back side of photovoltaic cell; Require to have good heat conductivity and insulating properties between heat collector and the photovoltaic cell;
(5) heat insulation layer is used to suppress heat collector through the heat radiation of heat conduction ambient, reduces its bottom and thermal loss on every side; It is little, not yielding and do not produce the characteristics of pernicious gas that heat insulation layer requires to have thermal conductivity;
Said attemperater (2) is used to deposit photoelectricity/hot sunlight receiver (3) heated hot water; In photoelectricity/hot sunlight receiver (3) and attemperater (2), lean on the pressure differentials that the water temperature difference is produced among both to promote the hot water motion, realize the circulation heating of water;
Said energy control and management subsystem (4) system is used for the tracking Control to photovoltaic cell peak power output point on the one hand, improves photovoltaic cell electricity delivery efficiency; On the other hand the energy storage of energy storage (5) is controlled;
Said energy storage (5) is used to store the electric energy of photovoltaic cell output;
Said upper circular tube (7) and following circulation pipe (6) are used for attemperater (2) and are connected with water route between photoelectricity/hot sunlight receiver (3);
Annexation between the above-mentioned building block is following:
Attemperater (2) is connected with the cold water inlet end with the hot water outlet end of photoelectricity/hot sunlight receiver (3) respectively through upper circular tube (7), following circulation pipe (6); Flat reflective concentrator (1) is connected with photoelectricity/hot sunlight receiver (3); The anodal of energy control and management subsystem (4) links to each other with middle photovoltaic cell output cathode of photoelectricity/hot sunlight receiver (3) and energy storage (5) positive pole simultaneously; The negative pole of energy control and management subsystem (4) links to each other with the output negative pole of the middle photovoltaic cell of photoelectricity/hot sunlight receiver (3) and the negative pole of energy storage (5) simultaneously;
The course of work of native system is following:
At first, sunlight is radiated at the upper surface of photoelectricity/hot sunlight receiver (3) through direct irradiation, flat reflective concentrator (1) reflection dual mode; Photoelectricity/hot sunlight receiver (3) converts the incident sunlight into electric energy and heat energy;
Photovoltaic cell is after energy control and management subsystem (4) carries out MPPT maximum power point tracking control, and the output electric energy also stores in the energy storage (5), guarantees that thus photovoltaic cell has maximum power output; Simultaneously, the charge and discharge process of energy control and management subsystem (4) control energy memory prevents that energy storage (5) from overcharging and overdischarge;
The heat energy that photoelectricity/hot sunlight receiver (3) produces is used to the water heating in the thermal-arrest organ pipe; Photoelectricity/hot sunlight receiver (3) is connected with attemperater (2) with following circulation pipe (6) through upper circular tube 7, and leans on the middle different pressure differentials that produce of water temperature of heat collector and attemperater (2) to promote the hot water motion, and hot water is kept in the attemperater (2).
2. water hot type photoelectricity as claimed in claim 1/heat solar system is characterized in that, the area of said flat reflective concentrator (1) is greater than the top surface area that equals photoelectricity/hot sunlight receiver (3).
3. water hot type photoelectricity as claimed in claim 1/heat solar system is characterized in that, said flat reflective concentrator (1) can tilt according to the difference of Various Seasonal sun altitude forward or backward.
4. water hot type photoelectricity as claimed in claim 1/heat solar system is characterized in that the space that between stay-warm case and photovoltaic cell end face, constitutes is between 5-10cm.
5. water hot type photoelectricity as claimed in claim 1/heat solar system; It is characterized in that; In photoelectricity/hot sunlight receiver (3), can be through changing the ratio that ratio that the photovoltaic cell area accounts for photoelectricity/hot sunlight receiver (3) top surface area is come the change system output electricity and the heat efficiency; The coverage rate ξ of photovoltaic cell is expressed as:
Figure FSB00000805957200031
In the formula 1, A cBe photoelectricity/hot sunlight receiver (3) top surface area, A PvArea for photovoltaic cell; Coverage rate ξ can be expressed as the influence of system's delivery efficiency:
η pvt=ξη pvt (2)
In the formula 2, η tBe the heat conversion efficiency of heat collector, η PvPhotoelectric conversion efficiency for photovoltaic cell.
CN201110038851A 2011-02-16 2011-02-16 Water-heating photoelectric/heat solar system Expired - Fee Related CN102176483B (en)

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CN105515529A (en) * 2016-01-27 2016-04-20 南京工程学院 V-shaped groove type low-power light concentration solar photovoltaic and photo-thermal integrated device
KR20190057091A (en) * 2016-09-22 2019-05-27 칭다오 오스텍 솔라 테크놀로지 씨오. 엘티디. Apparatus and system for generating electricity with an integrated circuit

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